<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="BeatingHeart.css">
<title>跳到的心</title>
</head>
<body>
<div id="heart">
    <div class="left"></div>
    <div class="right"></div>
    <div class="bottom"></div>
</div>
</body>
</html>